The possible causes of bleeding in men’s urine are drug interference, infection, stones, urethral injury, prostate enlargement, malignant tumors and so on. It is necessary to seek medical treatment in a timely manner. 1. Drug interference: if you take antiplatelet drugs or anticoagulant drugs for a long time, the use of these drugs may lead to the appearance of hematuria. 2. Urinary tract infections: the problem of infection needs to be drained, which can basically be diagnosed through simple urine routine. If the infection is identified, anti-infection treatment is needed, and the bleeding may gradually stop. 3. Urinary stones: there is often pain in the lower back and abdomen, hematuria appears or worsens after activity, ultrasound or CT can make a clear diagnosis. 4. Urethral injury: the most common causes are falling from a height, legs riding over an object. If there is a clear history of trauma, then it is recommended to seek medical attention in time to deal with the trauma, and the bleeding can gradually stop. 5. Prostatic hyperplasia: When prostatic hyperplasia occurs, painless hematuria of varying degrees can occur if the larger blood vessels of the mucous membrane on the surface of the hyperplastic gland rupture. It is recommended to consult a doctor in time, under the guidance of the doctor to retain a urinary catheter, take the urinary catheter pressure, bleeding can gradually stop. 6. Malignant tumor: for painless hematuria throughout the naked eye, but also to exclude malignant tumors. If determined as a tumor, it is necessary to actively treat the tumor. Men bleeding in urine, it is recommended that timely medical treatment, improve the examination, find the cause of bleeding, treatment under the guidance of the doctor, to avoid delaying the condition.